Yamaha CS80

It is not the same.  The E70 & stage model EX-2 use wavetable 
oscillators and have 7-note polyphony per manual, or a total of 11 notes 
on both manuals together.  The filters are close, they are IG00155 
filter ICs that as far as i can tell only lack the key voltage control 
input to scale the filter to a keyboard.  The EGs, while exhibiting 
similar parameters, are actually digitally programmed.  I have an EX-2, 
and I can get some CS-80ish sounds from it using the upper/lower coupler 
for layering 2 patches, but it ends up sounding more organ than 
synthesizer.  It is a nice instrument nonetheless.

Crow
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matrix wrote:
> There's a guy on YouTube putting up videos of the Yamaha Electone E70
> claiming it to have the same synth engine as the CS80.  I put a couple of
> his vids up here:
>
>